Sodium Erythorbate is white or yellow white crystal grain or crystal powder, odorless, has little salt, the melting point is over 200℃, it is rather stable when being dry exposed to the air, but in the water solution, when there is air, metal, heat and light, the oxidation will occur. It easily dissolves in water, 16g/100ml at normal temperature, hardly dissolves in ethanol, the PH value of 2% water solution is 6.5-8.0.